Preheat the oven to 350F, and spray a 9×9 baking pan with nonstick spray. Set aside.
In a medium, microwave-safe bowl, combine the chocolate chips, butter, water/milk, and brown sugar. Microwave for 30-45 seconds, until everything is smooth and melted.
Let cool slightly, then whisk in the eggs, one at a time, and the vanilla extract.
Stir in the flour, salt, baking powder, and baking soda.
Pour batter into your prepared pan, and bake for 25-30 minutes. You want a toothpick inserted in the center to come out with moist crumbs {but not liquid}. Let cool slightly.
If enjoyed right after baking, they will be very gooey! After they are cooled off, though, they will be soft and fudgy.
Recipe by The Baking Fairy at https://www.thebakingfairy.net/2018/02/easiest-one-bowl-truffle-brownies/